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Malicious package

@selfpentest/bin-confusionnpm

@selfpentest/bin-confusion is a confirmed malicious npm package (MAL-2026-17292) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @selfpentest/bin-confusion (npm)

MAL-2026-17292
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @selfpentest/bin-confusion

What this malware does

package.json registers a bin entry named npm pointing at npm.js, deliberately colliding with the core npm CLI. Once this package is installed as a dependency, any npm... invocation in a consuming project's scripts resolves via node_modules/.bin to this shim, executing the shipped code before (or instead of) the real npm. npm.js contains a steal() routine that reads process.env.HOME, process.env.SECRET, and the first 30 bytes of ~/.ssh/known_hosts, concatenates them into a query string, and issues a fetch GET to http://localhost:1337/. The destination is loopback in this build, but the collected data (installer SSH known_hosts contents and environment secrets) is packaged into a functioning exfiltration primitive that fires whenever the shadow npm shim is invoked from the installer's build scripts. The scope name (@selfpentest) and README frame this as a demonstration, but the shipped tarball is a working bin-shadow + credential-read + network-send chain against installers who add it as a dependency.

Malicious versions

2 flagged
1.0.01.0.1

Indicators of compromise (SHA-256)

40a68543ca2674f2b90d89dd52516736791b7886d617c694d89dd3135e7499f3
b8eee4f9fa3dd0a476be7853709b1d126d84b0cc51b9a298d822038cb7c05c80

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @selfpentest/bin-confusion (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @selfpentest/bin-confusion across your stack and pipelines.

  2. If you installed it — respond

    @selfpentest/bin-confusion is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If @selfpentest/bin-confusion was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks @selfpentest/bin-confusion before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. @selfpentest/bin-confusion on npm has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020685IN-MAL-2026-020687

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @selfpentest/bin-confusion-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

@selfpentest/bin-confusion (npm) malicious package — MAL-2026-17292 | O3 Security